Ayuda con este problema de fisica por es urgente dos ciclistas se mueven de tal forma que sus posiciones vienen dadas por: xa, xb. donde xa= -5t + 3. y xb= 6t - 4 xa y xb son las pocisiones de los ciclistas en cada intervalo de tiempo: responde a) cuanto tiempo tardan los ciclistas en encontrarse? b) cuanto tiempo ha pasado antes de que los ciclistas esten separados 50 metros?

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Acoyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 4.25 s later. let the x axis point due east and the y axis point due north. find the direction of the coyote's average acceleration during that time.

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.